Automotive brake



Feb. 2 1926;

S. G. DQWN AUTOMOTIVE BRAKE Filed March 11, 1924 I I 9 I O x} x mvamohSIDN BY 9. DOWN ATTORNEY Patented Feb. 2, 192,6.

UNITED *s'r r SIDNEY G. DOWN, OF PITTSBURGH, PENNSYLVANIA. ASSIGNGR TOTHE WESTING- HOUSE AIR BRAKE COMPANY, OF WILMERDING. PENNSYLVANIA, ACORPORA- TION OF PENN SYLVANIA.

AUTOMOTIVE BRAKE.

Application filed March 11, 1924. Serial No. 698,507.

To uU'w/zom it'll/(1y concern -le it known that l, Slum-1v G. DowN, acitizen of the. l nited States. residing at Pittsburgh, in the county ofAllegheny and State of Pennsylvania. have invented'new and usefulImprovements in Automotive llrakes, of which the following is aspecificationQ This invention relates to brakes. and more particularlyto a front wheel fluid pressure.

brake for a motor vehicle.

The principal object of luv invention is'to provide an improved brake ofthe above ('lltll'ilt'tOl'. j v

In the acconmanying drawing; Fig. l is a face view of a fluid pressurefront wheel brake mechanism embodying my invention; and Fig. 2 a centralsectional view of the construction shown in Fig. 1. 1n the drawing, thereference numeral 1 indicates the front axle of a motor vehicle and :2the front wheel. Said wheel is supported b a steering knuckle 3 which iseonneetet to the front axle by the pintle pin 4. f

Secured to the front wheel 2 is a brake drum 5 having mounted therein apair of pivoted brake heads 6, each provided with a brake shoe 7 adaptedto frictionally engage the internal friction face 8 of the brake drum 5.

Secured to the lower end of the pintle pin 4- is a flanged brake chamber9 and secured to said chamber is a flanged cover plate 10. Intermediatethe brake chamber 9 and the cover plate 10 is a flexible diaphragm 11.the chamber at one side of said diaphragm being connected to afluidpressure supply and exhaust pipe 12. v

pressure plate lileiurae'es the other side of the diaphragm II andsecured to said plate is a rod it which extends upwardly through aeeutralluu'e in the pintle pin t.

livotally attached to eaeh free end of the brake heads (3 are links 15.said links being pivotally.eonneeted by a ink or crosshead lt'. 'lhecrosshead It; is provided with a depression or socket at its under facefor receiving the hall shaped end of the rod 14.

When fluid under pressure is supplied through pipe 12 to the diaphragmll, said diaphragm'is moved upwardly, causing an upward movement of therod It. The crosshead as is thus forced upwardly so as to cause thelinks 15 to spread the ends of the brakeheads 6 and thereby' the brakeheads are expanded so that the brake shoes 7 are brought into frictionalengagement with the friction face 8 of the brake drum 5, thus elleetingran a iplieation ot'- the brakes at the front wheel of the vehicle.

By the above described construction, the fluid pressure brake chamber isdisposed wholly within the brake drum. thus providing a neat compactconstruction.

Ha ring now described my invention, what I claim as new and desire tosecure by Letters Patent. is:

1. In a vehicle brake, the combination with a front Wheel of a motorvehicle, a steerin; knuekle, and a pintle pin mounted in' said knuckle.of a brake drum secured to the front wheel, brake heads mounted in saiddrum, a fluid pressure brake chamber s0 cured to said pin. a movableabutment in said chamber, and a rod operable by said abutment andextending, through said pintle pin and operatively connected to saidbrake heads.

2. In a vehicle brake, the combination with a front wheel of a motorvehicle and a steering connection for said Wheel including a pintle pin.of a brake drum secured to said wheel. brake heads mounted in said drum,:1 fluid pressure brake chamber secured to one end of said pin, amovable abutment in said chamber. and a rod extending: through a centralbore in said pintle pin and operable by said abutment and having anoperative conn'ect ion with said brake heads at the other end of saidpintle pin.

In testimony whereof I have hereunto set my hand.

lDN-E Y (.r. DOWN.

